Comment 18 for bug 2045168

I am removing the Horizon from the affected projects because I found out that the issue is caused by haproxy. The charmed installation of horizon installs and configures haproxy under-the-hood (which I didn't know and had assumed that the installation was equivalent to upstream, but I was wrong. Usually charms have haproxy added optionally for HA, but the horizon charm is an exception) and that one is causing the 30 second limit. The problem is solved by configuring the charm with the setting

juju config openstack-dashboard haproxy-server-timeout=300000